Final Rule for Procedures for Testing Highway and Nonroad Engines and Omnibus Technical Amendments
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Rule Summary
The U.S. Environmental Protection Agency (EPA) is revising the procedures for testing various categories of nonroad engines. We are also applying these same procedures to heavy-duty highway engines. This common set of test requirements is intended to streamline laboratory efforts for EPA and industry and to form the basis for internationally harmonized test procedures for nearly all categories of engines. This final rule also covers a wide range of amendments to EPA regulations for most highway and nonroad sectors.
- Final Rule (pdf) (7.4 MB, July 13, 2005)
Rule History
Additional Resources
Fact Sheet
- Changed Test Procedures for Nonroad Engines and Heavy-Duty Highway Engines (pdf) (124 KB, EPA420-F-05-036, July 2005)
- Technical Support Document & Summary and Analysis of Comments (pdf) (1.07 MB, PA420-R-05-008, June 2005)